Evaluation of Catalysts and Optimization of Reaction Conditions for the Dehydration of Methyl Lactate to Acrylates

Abstract

Abstract: The production of acrylates from biomass-originated lactic acid is of extraordinary importance,to overcome the increasing worldwide shortage of petroleum.In this study,the catalytic dehydration of methyl lactate over a calcium sulfate catalyst,with various promoters,has been carried out to identify potential catalyst/promoter com-binations for acrylate production.The best catalyst for methyl acrylate formation in this study has been calcium sulfate,with cupric sulfate and phosphates as promoters.The optimal mass ratio of m(CaSO₄):m(CuSO₄):m(Na₂HPO₄):m(KH₂PO₄)is 150.0:13.8:2.5:1.2.Effects of carrier gas,reaction temperature,feed concentration as well as contact time on the dehydration of methyl lactate have been investigated.With nitrogen as a carrier gas,a combined yield of acrylic acid and methyl acrylate is 63.9% from 60%(by mass)methyl lactate at 400℃ with 7.7 seconds contact time.

Key words: acrylate, contact time, cupric sulfate, dehydration, promoters

摘要： The production of acrylates from biomass-originated lactic acid is of extraordinary importance,to overcome the increasing worldwide shortage of petroleum.In this study,the catalytic dehydration of methyl lactate over a calcium sulfate catalyst,with various promoters,has been carried out to identify potential catalyst/promoter com-binations for acrylate production.The best catalyst for methyl acrylate formation in this study has been calcium sulfate,with cupric sulfate and phosphates as promoters.The optimal mass ratio of m(CaSO₄):m(CuSO₄):m(Na₂HPO₄):m(KH₂PO₄)is 150.0:13.8:2.5:1.2.Effects of carrier gas,reaction temperature,feed concentration as well as contact time on the dehydration of methyl lactate have been investigated.With nitrogen as a carrier gas,a combined yield of acrylic acid and methyl acrylate is 63.9% from 60%(by mass)methyl lactate at 400℃ with 7.7 seconds contact time.

关键词: acrylate, contact time, cupric sulfate, dehydration, promoters

ZHANG Jinfeng, LIN Jianping, XU Xiaobo, CEN Peilin. Evaluation of Catalysts and Optimization of Reaction Conditions for the Dehydration of Methyl Lactate to Acrylates[J]. , 2008, 16(2): 263-269.

张金锋, 林建平, 许晓波, 岑沛霖. Evaluation of Catalysts and Optimization of Reaction Conditions for the Dehydration of Methyl Lactate to Acrylates[J]. , 2008, 16(2): 263-269.

References

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